internal void RandevuTarihi(System.Windows.Forms.MonthCalendar monthCalendar1) { con.ConnectionString = "Data Source = ERCAN ; database = appointment ; integrated security = true"; con.Open(); SqlCommand cmd = new SqlCommand("select RandevuTarihi from PatientsInfo ", con); SqlDataReader dr = cmd.ExecuteReader(); while (dr.Read()) { monthCalendar1.AddBoldedDate(DateTime.Parse(dr["RandevuTarihi"].ToString())); } monthCalendar1.UpdateBoldedDates(); dr.Close(); }